JSON Formatter / Validator / Minifier
Free online JSON tool. Format, validate, and minify JSON instantly. Supports nested objects, syntax highlighting, error pinpointing. Privacy-friendly: all processing in your browser.
About this tool
All processing happens in your browser โ data never leaves your device. Supports nested objects, arrays, Unicode, escape characters. Click Validate to verify JSON validity (error message shows the line).
Common use cases
- ๐ Debug API responses: paste messy one-liner JSON, click Format to see structure
- ๐ฆ Minify config before deploy: reduce file size
- โ Validate webhook payloads: pinpoint syntax errors
- ๐ Diff two JSONs: format each, then use browser diff tools